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arXiv · 1609.06920

Dark Energy and Dark Matter in a Model of an Axion Coupled to a Non-Abelian Gauge Field

Stephon Alexander·Robert Brandenberger·Juerg Froehlich
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Abstract

We study cosmological field configurations (solutions) in a model in which the pseudo-scalar phase of a complex field couples to the Pontryagin density of a massive non-abelian gauge field, in analogy to how the Peccei-Quinn axion field couples to the $SU(3)$-color gauge field of QCD. Assuming that the self-interaction potential of the complex scalar field has the typical {\it Mexican hat} form, we find that the radial fluctuations of this field can act as {\it Dark Matter}, while its phase may give rise to tracking {\it Dark Energy}. In our model, Dark-Energy domination will, however, not continue for ever. A new component of dark matter, namely the one originating from the gauge field, will dominate in the future.

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Stephon Alexander, Robert Brandenberger, Juerg Froehlich. 2016-09-22. Dark Energy and Dark Matter in a Model of an Axion Coupled to a Non-Abelian Gauge Field. https://arxiv.org/abs/1609.06920

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